Toilet tank cover



FIG. 1 is a top, front perspective view of a toilet tank cover showing my new design, the toilet being shown in broken lines for illustrative purposes only;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side elevation view thereof.

The side opposite to that shown in FIG. 5 is identical thereto. 

The ornamental design for a toilet tank cover, as shown and described. 